I recently made an update on my pc ,i bought new mobo(gigabyte b75m-d3h) and a new cpu (i3 3220) i connected all the cables but next to cpu is a 8 pin connector and says ATX_12V_2x4 but i have only one 4 pin and when i start the pc nothing happens
Even if you buy that extender, you won't be getting the correct power that your CPU needs. If you don't plan on stressing it too much, get the extender. But I wouldn't recommend it. Don't cheap out on a build. Buy a good power supply with plenty of headroom.
It should at least turn the fans. Test the board without the graphics card (use the onboard). There's a test for power supplies (using a paper clip): http://www.youtube.com/watch?v=5FWXgQSokF4.
Check also the connections of the power cables and of the front panel switches. If unsure how to connect them, check the manual.
No it doesnt do anything ,but i have problem with front panel connectors i haven't connected these cables:
chassis intrussion header
SPDIF_O(S/PDIF Out Header)
F_USB 1/2(USB2.0/1.1 Headers)
The power supply has a ATX 20+4 pin and a 4-pin CPU connector. Connect the 20+4 to the board's 24 pin connector and the 4-pin to the corresponding board's one. Connect a case fan to the molex or to the board's header. Connect the power switch to the board's connector. No other connections (disconect all other cables). Start the board. The fans should start spinning.
No, Romania. You'll check if the power supply powers the board (fans start spinning). You can find some tutorials regarding motherboard installation on Youtube. If you don't have the board's manual, I can provide a link.